package com.itheima.reggie.filter;

import com.alibaba.fastjson.JSON;
import com.itheima.reggie.common.BaseContent;
import com.itheima.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Slf4j
@WebFilter(filterName = "loginCheckFilter",urlPatterns = "/*")
public class LoginCheckFilter  implements Filter {
    public static final AntPathMatcher PATH_MATCHER = new AntPathMatcher();

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;

        String requestURI = request.getRequestURI();
        log.info("拦截到请求{}",requestURI);
        String[] url = new String[]{
                "/employee/login",
                "employee/logout",
                "/backend/**",
                "/front/**",
                "/common/**",
                "/user/**"
        };

        boolean check = doCheck(url,requestURI);

        if (check){
            log.info("本次请求不需要处理{}",requestURI);
            filterChain.doFilter(request,response);
            return;
        }

        if (request.getSession().getAttribute("employee")!=null){
            log.info("用户已登录，用户id为{}",request.getSession().getAttribute("employee"));
            Long empId = (Long) request.getSession().getAttribute("employee");
            BaseContent.setCurrentId(empId);

            filterChain.doFilter(request,response);
            return;
        }

        if (request.getSession().getAttribute("user")!=null){
            log.info("用户已登录，用户id为{}",request.getSession().getAttribute("user"));
            Long userId = (Long) request.getSession().getAttribute("user");
            BaseContent.setCurrentId(userId);
            filterChain.doFilter(request,response);
            return;
        }

        log.info("用户未登录");
        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
        return;

    }
    public boolean doCheck(String[] url,String RequestUrl){
        for (String s : url) {
            boolean match = PATH_MATCHER.match(s,RequestUrl);
            if (match){
                return true;
            }
        }
        return false;
    }
}
